T6 15w-40 not cleaning? - Diesel Forum - TheDieselStop.com
'99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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post #1 of 12 (permalink) Old 08-09-2019, 08:23 PM Thread Starter
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T6 15w-40 not cleaning?

Just got a question for those of you that have been running the new T6 15w...I have a 1000 miles on this oil since last oil change and it still looks like new. All my previous oil changes with T6 5w turned black almost immediately it seemed which would indicate that it was cleaning. Anyone done a change with the new 15w and monitored it lately?

2000 7.3 PSD 4x4 Auto Trans., CC, short box 207,500 miles.
PHP Hydra, Bilstein 5100's, Bilstein steering stabilizers, Auto Meter 3 gauge pod--EGT, Trans Temp & Boost, Deep Trans Pan, Rotella ELC and T6 oil, DieselSite 203*, Riffraff Billet wheel, 4" turbo back MBRP 5" straight pipe, Donaldson 6637 blue, 20" Fuel wheels wrapped with 37" MT's
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post #2 of 12 (permalink) Old 08-10-2019, 09:41 AM
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My 7.3 oil changes are generally pretty clean looking after 1K miles with light to moderate duty during that time. I don't know, but, perhaps using fuel additives that help keep the engine clean also benefit the oil? Been using any fuel additives? Also, since full synthetics aren't as easily stressed under heat and other oxidation influences, perhaps it just doesn't get dirty as quickly. It could also be that the expensive oil filter you bought is doing its job.

Last edited by obxguy; 08-10-2019 at 12:58 PM.
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post #3 of 12 (permalink) Old 08-11-2019, 02:56 PM Thread Starter
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Could be. So, i've owned this truck for 18 months, did an oil change immediately when I picked it up and 2 since every 5000 miles. First 2 with T6 5w and third with 15w. The first change I added Seafoam to the crankcase. This recent one i did use a Motorcraft filter whereas the first two I didn't. However, I've heard guys say with bypass filters that their oil turns black in a minute of running the engine.

2000 7.3 PSD 4x4 Auto Trans., CC, short box 207,500 miles.
PHP Hydra, Bilstein 5100's, Bilstein steering stabilizers, Auto Meter 3 gauge pod--EGT, Trans Temp & Boost, Deep Trans Pan, Rotella ELC and T6 oil, DieselSite 203*, Riffraff Billet wheel, 4" turbo back MBRP 5" straight pipe, Donaldson 6637 blue, 20" Fuel wheels wrapped with 37" MT's
Security: Ravelco (for the pro's), Viper (for the rookies), The Club 1100 Steering Wheel Lock (visual deterrent).
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post #4 of 12 (permalink) Old 08-11-2019, 04:05 PM
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I think 1,000 miles is too soon to have any concerns...or even assumptions.


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2002 F-250 4x4 CC SB 7.3 PSD w/4R100. 182,000 miles.
NOS Black CPS. ScanGauge-II, AIC, Bilstein 5100, Stancor GPR, Marinco Mod, B&W Turnover Ball, Michelin Defender LTX


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2002 F-250 4x4 SC LB 7.3 PSD w/ZF-6. 177,000 miles.
NOS Black CPS. ScanGauge-II. Bilstein 5100. Stancor GPR. Walker BTM. Noco Mod. Michelin Defender LTX 285/75/16.

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2000 F-250 4x4 SC SB 7.3 PSD w/4R100. 164,000 miles.
NOS Black CPS. Rebuilt Fuel bowl w/gold spring, 6.0 Cooler, Walker BTM, Stancor GPR, Michelin LTX M&S2.
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post #5 of 12 (permalink) Old 08-11-2019, 04:29 PM Thread Starter
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Quote:
Originally Posted by ArcticDriver View Post
I think 1,000 miles is too soon to have any concerns...or even assumptions.
I'm not really concerned about it, just wondering honestly.

What I've heard from many others is that there oil turns black after the first drive including myself with the first two changes. "If it's black, it's doing it's job." The result of cleaning diesel soot. Question is, why do some experience black oil every time and some don't? Mods maybe, larger injectors, smokier truck...?

2000 7.3 PSD 4x4 Auto Trans., CC, short box 207,500 miles.
PHP Hydra, Bilstein 5100's, Bilstein steering stabilizers, Auto Meter 3 gauge pod--EGT, Trans Temp & Boost, Deep Trans Pan, Rotella ELC and T6 oil, DieselSite 203*, Riffraff Billet wheel, 4" turbo back MBRP 5" straight pipe, Donaldson 6637 blue, 20" Fuel wheels wrapped with 37" MT's
Security: Ravelco (for the pro's), Viper (for the rookies), The Club 1100 Steering Wheel Lock (visual deterrent).
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post #6 of 12 (permalink) Old 08-12-2019, 10:51 AM
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Quote:
Originally Posted by JJEdwards View Post
I'm not really concerned about it, just wondering honestly.

What I've heard from many others is that there oil turns black after the first drive including myself with the first two changes. "If it's black, it's doing it's job." The result of cleaning diesel soot. Question is, why do some experience black oil every time and some don't? Mods maybe, larger injectors, smokier truck...?

I could only guess why some people have their oil turn black so quickly. But, if it was me, I would be VERY concerned about that. Black mean dirty and dirty means excessive wear. My first thought is that these trucks are chipped and tuned with an ugly rich fuel mixture. I dunno. But, it can't be good.

Right now, my oil has about 600 miles on it and is just starting to look a little dirty... but, not black by a long shot. I haven't driven it more than 10 miles since April and I have a 1,600 mile trip to make this week. I'm changing only the filter today with an STP XL filter (best I could find between Walmart and Auto Zone for a 20 year old truck). It's a quart low right now. I'm going to drain about 2 quarts of the old oil and then add 3 quarts of Rotella 15w40 back in, to fill it up, and make the 1,600 mile trip this week pulling a 16 single axle enclosed trailer. Based on previous experience, I expect to burn a quart of oil or less during this trip, and I expect the oil to be reasonably translucent when I get back home from this trip.

So, to me, someone who says their oil turns black on the first drive after a change is either dogging the **** out of their truck, doesn't have the chip tuned right, or has some serious engine/fuel issues.

I will also add that my truck has no power chip, no significant mods, and when I step on the accelerator, I don't pump clouds of black soot out the exhaust. Maybe that's why my oil stays reasonably clean.
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post #7 of 12 (permalink) Old 08-12-2019, 12:38 PM Thread Starter
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I have to apologize for starting an oil thread. LOL

2000 7.3 PSD 4x4 Auto Trans., CC, short box 207,500 miles.
PHP Hydra, Bilstein 5100's, Bilstein steering stabilizers, Auto Meter 3 gauge pod--EGT, Trans Temp & Boost, Deep Trans Pan, Rotella ELC and T6 oil, DieselSite 203*, Riffraff Billet wheel, 4" turbo back MBRP 5" straight pipe, Donaldson 6637 blue, 20" Fuel wheels wrapped with 37" MT's
Security: Ravelco (for the pro's), Viper (for the rookies), The Club 1100 Steering Wheel Lock (visual deterrent).
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post #8 of 12 (permalink) Old 08-12-2019, 04:27 PM
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Quote:
Originally Posted by JJEdwards View Post
I have to apologize for starting an oil thread. LOL <img src="http://www.thedieselstop.com/forums/images/smilies/smile.gif" border="0" alt="" title="Smile" class="inlineimg" />

Its why I didn’t respond to your 2nd post...I saw the trap you were craftily setting...Lol


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2002 F-250 4x4 CC SB 7.3 PSD w/4R100. 182,000 miles.
NOS Black CPS. ScanGauge-II, AIC, Bilstein 5100, Stancor GPR, Marinco Mod, B&W Turnover Ball, Michelin Defender LTX


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2002 F-250 4x4 SC LB 7.3 PSD w/ZF-6. 177,000 miles.
NOS Black CPS. ScanGauge-II. Bilstein 5100. Stancor GPR. Walker BTM. Noco Mod. Michelin Defender LTX 285/75/16.

SOLD:
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2000 F-250 4x4 SC SB 7.3 PSD w/4R100. 164,000 miles.
NOS Black CPS. Rebuilt Fuel bowl w/gold spring, 6.0 Cooler, Walker BTM, Stancor GPR, Michelin LTX M&S2.
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post #9 of 12 (permalink) Old 08-12-2019, 06:01 PM Thread Starter
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2000 7.3 PSD 4x4 Auto Trans., CC, short box 207,500 miles.
PHP Hydra, Bilstein 5100's, Bilstein steering stabilizers, Auto Meter 3 gauge pod--EGT, Trans Temp & Boost, Deep Trans Pan, Rotella ELC and T6 oil, DieselSite 203*, Riffraff Billet wheel, 4" turbo back MBRP 5" straight pipe, Donaldson 6637 blue, 20" Fuel wheels wrapped with 37" MT's
Security: Ravelco (for the pro's), Viper (for the rookies), The Club 1100 Steering Wheel Lock (visual deterrent).
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post #10 of 12 (permalink) Old 08-12-2019, 06:07 PM
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Black in diesel oil is DIRECTLY related to fueling. If you tow heavy it gets black quick. If you drive empty, highway, and easy it stays clean a along time. Many fleet operators use a fuel credit card system and the transaction feeds back the fuel purchase quantity and their oil change for their vehicles is done when the gallons burned reaches their trigger points. All my trucks have had times when I change then haul hay or tractors and the oil is really black quick and other times I do oil change and thousands of miles later it is barely grey.
The residue from combustion is wiped into oil off cylinder walls by piston rings.

2015 F350 Platinum Max Tow What a beast with the 4.30 gears!
2006 F450 CC Hauler bed 4x2 6.0 L 6.0 auto, Lariat, 4.30 r/a, SCT, 4in exh. 103K New heads to repair diesel in coolant, 148K.
2006 F350 Lariat CC Dually 4X2, 6.0 auto 4.10 LS, SCT, airbags, 4 in. exh. 154K Rebuilt engine to repair damage from burned piston. One head to fix fuel in oil problem.
36 feet on the floor Elite/Outlaw LQ horse trailer.
35+5 foot double tandem axle flatbed trailer.
36 foot double tandem axle flatbed trailer
36 foot Platinum 6 horse LQ, side load, full width back tack
2003 EB Expedition 171K (no engine repairs, gas burners are the new longevity leaders)
2004 Volvo V70R AWD-high miler in fleet, 253K (no engine repairs) Hail totaled it but I kept it. Looks like a golf ball now.
Suzuki Carry KEI truck, 660cc 3 cyl DOHC EFI 4X4 5 speed RHD. Sort of a Smart Car sized pickup. Eats Gators and Mules for lunch.
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post #11 of 12 (permalink) Old 08-12-2019, 08:16 PM
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Is it possible that the previous owner was towing heavy with it and you're not?

2001 F350 XLT 4X4 crew cab, dual rear wheels, long bed, black, 7.3l turbo diesel, automatic transmission, 4.10, shift on the fly, running boards, sliding rear window, 38 gal fuel tank, Odyssey extreme 65-PC1750T batteries, Michelin LTX-MS2 rear tires, Sumitomo Encounter front tires, Shell Rotella Ultra elc, 11,500 gvwr, 20,000 gcwr, 7500 gvw, completely stock, 114,000 miles when purchased, now has 250,000 miles, repairs so far: two starters, batteries, cps, brakes, tires, alternator, ball joints, locking hub, wheel hub, AC compressor, serpentine belt, power steering pump, driver's side window, ignition switch, o-ring, Spectra premium radiator, water pump, fan clutch, fan blades, thermostat, thermostat housing, tensioner. Stolen twice so far, but recovered both times with major damage.

2005 Nomad Rampage toyhauler made by Skyline. 11,500lb gvwr.
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post #12 of 12 (permalink) Old 08-13-2019, 01:11 PM Thread Starter
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Quote:
Originally Posted by DonWarkentin View Post
Is it possible that the previous owner was towing heavy with it and you're not?
Could be because I haven't towed my 8000 lb camper since the last oil change. I still do remember the oil turning black before I towed the last two times however.

2000 7.3 PSD 4x4 Auto Trans., CC, short box 207,500 miles.
PHP Hydra, Bilstein 5100's, Bilstein steering stabilizers, Auto Meter 3 gauge pod--EGT, Trans Temp & Boost, Deep Trans Pan, Rotella ELC and T6 oil, DieselSite 203*, Riffraff Billet wheel, 4" turbo back MBRP 5" straight pipe, Donaldson 6637 blue, 20" Fuel wheels wrapped with 37" MT's
Security: Ravelco (for the pro's), Viper (for the rookies), The Club 1100 Steering Wheel Lock (visual deterrent).
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